Portable forge.



L. cam/wow. PORTABLE FORGE. APPLICAi'I'ON FILED SEPT. 21. I916.

mmm fig, Patented m6, 4,19111.

vention-as applied to. a rivet forge, oi course, to he understood that the same may be adapted to other" devices wherein a con .trollable supply ofoompresse d' air may be;

employed for similar purposes.

Having thus described my mventlon, I claim:

1 Ina portable forge, the ciiim'bination or a fire pan, a conduit communicating with said pan, means for supplying air' under pressure .to the conduit, including. a difli'using nozzle located in said conduit and comprising a housing having opposed conicalcavities communicating at their apexes through a constricted passage, supply pipe forcompressed air connnahicating with the enlarged'end of. one of the cavities; and a conical plugfor the other cavity, shaped in correspondence theretoand adapted to be adjusted therein to vary the size of the conica'l interspaoe thus formed, said plug being provided with a plurality of apertures by which the air is diffused into the said conduit.

2. In a portable forge, the combination of a fire pan; a conduit communicating-with said pan; a diflusing nozzle located in said conduit, including a tapered cavity; means for admitting air under-pressure to the constri'cted end of said cavity a plug in theenfla'rged end of said cavity having a pluralitv of apertures by which the air is diffused into- SttldCOIlddlll; and means for adjusting said plug in said cavity, whereby the amount neeae e 0i" air admitted to said apertures may be varied.

In a portable forge, the combination of a fire pan; a conduit communicatin with said pan; a diffusing nozzle located in said conduit, including aconical cavity; means for admitting air under pressure to theconstricted end ofsaid cavity; a conical plug in the enlarged end of said cavity having a plurality of apertures by which the air is diffused into said conduit; and means for adjusting said plug in said cavity, whereby the amount ofair admitted to said apertures may be varied.

i l. In a portable forge, the combination of a fire pan; a conduit communicating with said pan; a diffusing nozzle located in said conduit andcomprisinga housing having a conical cavity; means for supplying compressed air to the constricted end of said cavity; and a conical plugfor the other end of said cavity shaped in correspondence thereto and adapted to be adjusted therein to vary the size of the conical interspaco 

